20577181383 has 16 divisors (see below), whose sum is σ = 33256051200. Its totient is φ = 12471018840.

The previous prime is 20577181351. The next prime is 20577181397. The reversal of 20577181383 is 38318177502.

20577181383 is a `hidden beast` number, since 20 + 5 + 77 + 181 + 383 = 666.

It is not a de Polignac number, because 20577181383 - 2⁵ = 20577181351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20577181783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34641423 + ... + 34642016.

It is an arithmetic number, because the mean of its divisors is an integer number (2078503200).

Almost surely, 2^20577181383 is an apocalyptic number.

20577181383 is a deficient number, since it is larger than the sum of its proper divisors (12678869817).

20577181383 is a wasteful number, since it uses less digits than its factorization.

20577181383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69283459 (or 69283453 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 20577181383 in words is "twenty billion, five hundred seventy-seven million, one hundred eighty-one thousand, three hundred eighty-three".